MySQL一直处于挂起状态(查询停留在发送数据上)
我有以下情况: 每周大约5次(与缓存清除,流量高峰等任何特定情况无关),某些查询停留在发送数据(show processlist)上: > SELECT `main_table`.`entity_id`, `main_table`.`level`, `main_table`.`path`, `main_table`.`position`, > `main_table`.`is_active`, `main_table`.`is_anchor`, > `main_table`.`name`, `url_rewrite`.`request_path` FROM > `catalog_category_flat_store_30` AS `main_table` > LEFT JOIN `core_url_rewrite` AS `url_rewrite` ON url_rewrite.category_id=main_table.entity_id AND > url_rewrite.is_system=1 AND url_rewrite.product_id IS NULL AND > url_rewrite.store_id='30' AND url_rewrite.id_path LIKE 'category/%' > WHERE (path LIKE '1/2/%') AND (main_table.store_id = …